a) & b)

#include <iostream>
using namespace std;

  void cmmogl ( int a, int b, int c, int d )
  {
      cout << "a = "; cin >> a;
      cout << "b = "; cin >> b;
      cout << "c = "; cin >> c;
      cout << "d = "; cin >> d;

      int ogl = 0;
    int k[3];
      while ( a!=0) {
        ogl = ogl * 10 + a % 10;
        a = a /10;
      }
      k[0] = ogl;
      cout << ogl << " ";

    ogl = 0;
       while ( b!=0) {
        ogl = ogl * 10 + b % 10;
        b = b /10;
      }
      k[1] = ogl;
      cout << ogl << " ";
      ogl = 0;
       while ( c!=0) {
        ogl = ogl * 10 + c % 10;
        c = c /10;
      }
      k[2] = ogl;
      cout << ogl << " ";
      ogl = 0;

       while ( d!=0) {
        ogl = ogl * 10 + d % 10;
        d = d /10;
      }
      k[3] = ogl;
      cout << ogl << " ";
    cout << endl;

        int maxim = k[0];
    for ( int i = 0; i < 3; i++ ) {
        if ( maxim < k[0] ) {
            maxim = k[i];
        }
    }
    cout << endl;
    cout << "Elementul maxim este: " << maxim;

    int minim = k[0];
    for ( int i = 0; i < 3; i++ ) {
        if ( minim > k[0] ) {
            minim = k[i];
        }
    }
    cout << endl << endl << endl;

    cout << "Elementul minim este: " << minim;

  }


int main(){

    int a,b,c,d;
    cmmogl(a,b,c,d);





}